What can ACF do?
ACF allows you, the developer, to take full control of the WordPress edit screen and tailor the content editing experience around your website's needs! Using ACF, you can add fields in addition to the WordPress visual editor or choose to hide it completely.
You may use Adv Custom Fields plugin for this and your future needs, or just write Vanilla PHP.
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How do you integrate a new WordPress site with ACF Pro (WordPress, development)?
It is not needed PRO, for you.